21228940

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{2647}}^1$

素因数の和:3057

約数の個数: 24

約数和(自身を含む): 44708832

約数和(自身を除く): 23479892

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 2647, 4010, 5294, 8020, 10588, 13235, 26470, 52940, 1061447, 2122894, 4245788, 5307235, 10614470, 21228940]

約数ペア:

[(1, 21228940), (2, 10614470), (4, 5307235), (5, 4245788), (10, 2122894), (20, 1061447), (401, 52940), (802, 26470), (1604, 13235), (2005, 10588), (2647, 8020), (4010, 5294)]